Personal Mastery Attenuates the Association between Greater Perceived Discrimination and Lower Amygdala and Anterior Hippocampal Volume in a Diverse Sample of Older Adults.

There is limited research investigating whether perceived discrimination influences brain structures that subserve episodic memory, namely the hippocampus and amygdala. Our rationale for examining these regions build on their known sensitivity to stress and functional differences along the long-axis of the hippocampus, with the anterior hippocampus and amygdala implicated in emotional and stress regulation. We defined perceived discrimination as the unfair treatment of one group by a dominant social group without the agency to respond to the event. A potential moderator of perceived discrimination is personal mastery, which we operationally defined as personal agency. Our primary goals were to determine whether perceived discrimination correlated with amygdala and anterior hippocampal volume, and if personal mastery moderated these relationships. Using FreeSurfer 7.1.0, we processed T1-weighted images to extract bilateral amygdala and hippocampal volumes. Discrimination and personal mastery were assessed via self-report (using the Experiences of Discrimination and Sense of Control questionnaires, respectively). Using multiple regression, greater perceived discrimination correlated with lower bilateral amygdala and anterior hippocampal volume, controlling for current stress, sex, education, age, and intracranial volume. Exploratory subfield analyses showed these associations were localized to the anterior hippocampal CA1 and subiculum. As predicted, using a moderation analysis, personal mastery attenuated the relationship between perceived discrimination and amygdala and anterior hippocampal volume. Here, we extend our knowledge on perceived discrimination as a salient psychosocial stressor with a neurobiological impact on brain systems implicated in stress, memory, and emotional regulation, and provide evidence for personal mastery as a moderating factor of these relationships.

'Some men just don't want to get hurt': perspectives of U.S. Virgin Islands men toward partner violence and HIV risks.

Objectives: Global evidence suggests that individuals who experience intimate partner violence (IPV) can have accelerated risk for HIV transmission. The U.S. Virgin Islands (USVI) has high per capita rates of HIV and IPV that can have devastating effects on women's health. Catalysts for these health disparities may be shaped by cultural and social definitions of conventional masculinity. Thus, understanding USVI men's perceptions about HIV risks and IPV are a necessary component of developing strategies to improve women's health. This study aimed to describe perceptions of HIV risks and IPV among USVI men.Design: We conducted two focus groups with 14 men living on St. Thomas and St. Croix, USVI. The focus group interview guide was culturally relevant and developed using findings from research conducted about these issues on USVI. Thematic analysis was used to analyze focus group data. Transcripts were coded and categorized by four research team members and discrepancies were reconciled. Themes were developed based on the emerging data.Results: Focus group participants were all US citizens born on the USVI, had a median age range of 20-25, 86% (12) were of African descent and 14% (2) were Hispanic. Themes emerging from the data were: (1) validating status, (2) deflecting responsibility, and (3) evoking fear and distrust. These ideas underscored the ways that attitudes and beliefs informed by gender and social norms influence IPV and sexual behavior between intimate partners.Conclusion: USVI society could benefit from interventions that aim to transform norms, promote healthy relationships, and encourage health-seeking behavior to improve the health of women partners.